SummaryAbnormally high levels of IgE are produced in various diseases, including atopic eczema, and a functional decrease in the T‐lymphocyte population occurs at the same time. T‐cell function has been studied in a group of asthma patients with high, normal and low IgE levels and in a control group.T‐cell function appears to be reduced in asthmatic patients with high concentrations of IgE when skin tests are performed with Candida antigen (P<0.05). There was also a decline in the lymphocyte transformation tests with Candida antigen in autologous serum (P<0.05), although not in foetal calf serum. The responses toin vivotests with streptokinase‐streptodornase were normal, as was the response of the lymphocytes
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